kotlin-cesium-engine/cesium.engine/SampledProperty

SampledProperty

external class SampledProperty(type: Double, var derivativeTypes: ReadonlyArray<Packable<*>> = definedExternally)(source)

A Property whose value is interpolated for a given time from the provided set of samples and specified interpolation algorithm and degree.

//Create a linearly interpolated Cartesian2
const property = new SampledProperty(Cartesian2);

//Populate it with data
property.addSample(JulianDate.fromIso8601('2012-08-01T00:00:00.00Z'), new Cartesian2(0, 0));
property.addSample(JulianDate.fromIso8601('2012-08-02T00:00:00.00Z'), new Cartesian2(4, 7));

//Retrieve an interpolated value
const result = property.getValue(JulianDate.fromIso8601('2012-08-01T12:00:00.00Z'));

//Create a simple numeric SampledProperty that uses third degree Hermite Polynomial Approximation
const property = new SampledProperty(Number);
property.setInterpolationOptions({
    interpolationDegree : 3,
    interpolationAlgorithm : HermitePolynomialApproximation
});

//Populate it with data
property.addSample(JulianDate.fromIso8601('2012-08-01T00:00:00.00Z'), 1.0);
property.addSample(JulianDate.fromIso8601('2012-08-01T00:01:00.00Z'), 6.0);
property.addSample(JulianDate.fromIso8601('2012-08-01T00:02:00.00Z'), 12.0);
property.addSample(JulianDate.fromIso8601('2012-08-01T00:03:30.00Z'), 5.0);
property.addSample(JulianDate.fromIso8601('2012-08-01T00:06:30.00Z'), 2.0);

//Samples can be added in any order.
property.addSample(JulianDate.fromIso8601('2012-08-01T00:00:30.00Z'), 6.2);

//Retrieve an interpolated value
const result = property.getValue(JulianDate.fromIso8601('2012-08-01T00:02:34.00Z'));

Parameters

type

The type of property.

Constructors

SampledProperty

constructor(type: Packable<*>, derivativeTypes: ReadonlyArray<Packable<*>>? = definedExternally)

constructor(type: Double, derivativeTypes: ReadonlyArray<Packable<*>> = definedExternally)

Types

SetInterpolationOptionsOptions

interface SetInterpolationOptionsOptions

Properties

backwardExtrapolationDuration

var backwardExtrapolationDuration: Double

Gets or sets the amount of time to extrapolate backward before the property becomes undefined. A value of 0 will extrapolate forever.

backwardExtrapolationType

var backwardExtrapolationType: ExtrapolationType

Gets or sets the type of extrapolation to perform when a value is requested at a time before any available samples.

definitionChanged

val definitionChanged: DefaultEvent

Gets the event that is raised whenever the definition of this property changes. The definition is considered to have changed if a call to getValue would return a different result for the same time.

derivativeTypes

var derivativeTypes: ReadonlyArray<Packable<*>>

When supplied, indicates that samples will contain derivative information of the specified types.

forwardExtrapolationDuration

var forwardExtrapolationDuration: Double

Gets or sets the amount of time to extrapolate forward before the property becomes undefined. A value of 0 will extrapolate forever.

forwardExtrapolationType

var forwardExtrapolationType: ExtrapolationType

Gets or sets the type of extrapolation to perform when a value is requested at a time after any available samples.

interpolationAlgorithm

var interpolationAlgorithm: InterpolationAlgorithm

Gets the interpolation algorithm to use when retrieving a value.

interpolationDegree

var interpolationDegree: Double

Gets the degree of interpolation to perform when retrieving a value.

isConstant

val isConstant: Boolean

Gets a value indicating if this property is constant. A property is considered constant if getValue always returns the same result for the current definition.

type

var type: Any

Gets the type of property.

Functions

addSample

fun addSample(time: JulianDate, value: Packable<*>, derivatives: ReadonlyArray<Packable<*>>? = definedExternally)

Adds a new sample.

addSamples

fun addSamples(times: ReadonlyArray<JulianDate>, values: ReadonlyArray<Packable<*>>, derivativeValues: ReadonlyArray<ReadonlyArray<Any>>? = definedExternally)

Adds an array of samples.

addSamplesPackedArray

fun addSamplesPackedArray(packedSamples: ReadonlyArray<Double>, epoch: JulianDate? = definedExternally)

Adds samples as a single packed array where each new sample is represented as a date, followed by the packed representation of the corresponding value and derivatives.

getSample